Dobby-loom



F G. COBB.

Dov Loom.

APPLICATION FILED AUG.21,1919. 1,383,952@ atema June 2S, 1921,

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F G. COBB.

DOBBY LOOIVI.`

APPLICATION FILED AUG-2I| ISIS.

`1 ,$383,076. Patented June 28, 1921.

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UNITED STATES PATENT OFFICE.

DOBBY-LOOIVI.

Application led August 2l, 1919.

T NZZ aff/loin it may concern.'

llc it known that I, l" GORDON Conn, a citizen of the United States of America, and a resident of Greenville, county of Greenville, and State oiE South Carolina, have invented certain new and useful Improve ments in Debby-Looms. of which the following is a full and clear specification.

My invention relates to looms and more Wrrticularly to multipliers. The main object `of my invention is to render unnecessary the use in weaving certain classes of patterns of the long, heavy and cumbersome pattern-chains which have heretofore been generally employed. By the use of a multiplier, I can provide means for the weave of a special pattern which will appear in the cloth at regular intervals separated by the regular plain weave, without the use of the long pattern-chains which must include the pattern to be woven and patterns adapted to weave the plain cloth. A good eX- ample of this is the weaving of handkerchiefs which have a pattern or border separated by a strip of plain cloth. i accomplish this by providing a pattern-chain which, at predetermined intervals7 may be set in motion and which at the completion of the pattern and at the time when the pattern has been woven will remain idle while the plain cloth is being woven, when it will again begin to operate to insert the pattern into the cloth.

Another object of my invention is to provide a pattern-chain mechanism which may be easily applied to the ordinary loom now in `use without a re-arrangement of the mechanism ofthe ordinary loom.

A still further object is to arrange suoli mechanisms@ that it may be operated when desired, but7 when it is necessary to weave just plain cloth, the pattern-chain will remain stationary indefinitely and the usual operation of the loom not be affected in any way.

A still further advantage of my invention is that the multiplier mechanism may be entirely removed and replaced when any part of the same become disarranged orV worn.

1With these objects in view, I will )roceed to more specifically describe and show the invention in the specication and drawings annexed.

In the drawings` Figure 1 is a perspective view of a p0r- Specication of Letters Patent.

Y cured on the end of Patented June 28, 1921. serial No. 318,927.

tion of the ordinary dobby loom showing my .invent-ion applied thereto;

4ig. 2 is a perspective view of a rear part of the ordinary loom showing the position of my invention;

Fig. 3 is a detail sectional view on the line 2:33 of iig, l

In the drawings, 1 indicates the ordinary dobby arch and 2 the rocker-arm journaled at 53. hiounted on the rocker-arm 2 bv means'of a nut and bolt and adapted tb rock with said rocker-arm is an arm 5 slotted longitudinally as shown at 6. A ratchetoperating' arm 7 carrying a dog" 8 has a pivotal and sliding connection vit-h the arm 5. .lhis connection is provided by a bolt 9 passing through the upper end of the arm 7 and through the slot 6 in the arm 5, which bolt is secured by a nut. 10 on the other end thereof. vA second nut 11 (more clearly1 shown in Fig. 3) is placed on the bolt so as to clamp the'arm T in any desired position in the slot 6 and at the same time allow it. to have a pivotal movement on the bolt 9.

ratchetwheel 12 is mounted on a studshaft 13 on the frame of the loom. Cast integral with the wheel 12 is a sleeve 14e1 car rymg a worm 15 made integral therewith so that wheel 12 and worm 15 will'turn simultaneously.

Removably secured to the dobby arch 1 by bolts 16 is a bracket 1T. This bracket may be of any suitable design but is prefer ably asshown and comprises an upright arm 1S which lies against the dobby arch and is secured thereto by the screws 16 and eX- tends outwardly at right angles thereto as at 19. Secured to the right angular portion and depending' therefrom is a vertical portion 2O having made integral therewith bearings 21 and 22. Passing through the l'iearings 2O is a shaft 23 carrying at one end thereof a worm-wheel 2+i adapted to mesh with the worm 15, Rigidly mounted on the other end of the shaft 23 is a bevel-gear 25. A second shaft 26 is mounted at right angles to the shaft 23 and extends transversely of the loom and has one or" its ends supported by the bearing 22 provided in the bracket 17. The other end of this shaft 26 is supported by a bearing-block 27 secured by a nut and bolt- 28 to the frame portion of the loom. A second bevel gear 29 is rigidly setheV shaft 26 adjacent adapted to mesh therethe bevel-gear and with.

Y the* different patterns i the arm 7.

30 designates a disk provided with a collar 31 and set-screw 32, by means of which it is rigidly secured to the other end ot' the shaft 26. A pawl 33 is loosely mounted on the end otthe shaft 26 with projections-beyond the disk 30, and this pawl is held in place by a collar 34 secured to the shaft by a set-screw A stud or pin 36 'is provided on the disk 8O near the outer periphery thereof and is adapted to engage the looselymounted pawl 33 to carry the same around its pivot when the disk 30 is rotated.

A bracket 3T mounted by a bolt 38 to the loom-trame pivotally supports an arm Bt) by a bolt at 40. Adjustably mounted on this arm 39 is a cam-plate 4l. Adjustment is allowed to plate 4l by means ot the bolts 42. Iy this arrangement, it is evident that the cam-plate 41 may be adjusted to any desired position with respect to Vthe arm 39.

A bracket 43 secured to the loom-'trame by a bolt 44 supports oneV end oi the actuator-liting-arm 45. This lifting-arm 45 is pivotally mounted on the bracket 43 as Vat 46. A lug 4T made integral with said arm and is adapted to coperate with supporting-lug 48 on the arm 39 to hold the arm 45 in its raised position. The arm 45 is biturcated as at 49 to Astraddle the pattern-chain-actuator-arm 50. Thus it will be seen that when the lug` 4T rests upon the lug 48, the iorward end of the arm 45 will be kept in the position indicated in Fig. l of the drawings and will support the arm 5() in its raised or inoperative position. A spring 5l maintains the arm 39 in the position shown in Fig. l, that is, in the position in which it supports the arm 45.

As in the ordinary looms now on the'market, the arm 50. receives its reciprocating motion trom the rocker-arm 2 and the dog 52 coperating with the ratchet 523 moves the pattern-chain 54 step by step to present and through the usual mechanism to operate the harness and weave the patterns into the cloth. In the drawings,lI have shown a loom in which there is Van upper and lower litter 55 and 56.

I will now describe the operation ot my invention in so tar as it controls thestarting ot the pattern-chain: rEhe rocker-arm 2 dur- Y ingits rocking motion transmits to the arm o a similar rocking motion owing to the mountingof said arm 54 upon the rockerarm 2. The ratchet-operatino` arm 7 will therefore receive a reciprocating` motion and will actuate the ratchet-wheel l2. I control the distance the ratchet-wheel is vmoved each time by adjusting the arm 7 in the slot 6, asy will be readily understood. Upon each rocking,` motion ot the arm'2 and the arm 5, the ratchet-wheel l2 will be turned a distance corresponding to the adjustment of A rotary motion, therefore, will be transn'iitted to the worm l5 and, through the worm-wheel 24, shalt 23 and bevel-gears and 29 to the shaft 2G, which will be rotated7 of course, at a very much less speed Vthan Vthe ratchet-wheel 'l2 owingto the reduction which occurs through the train ot gears just described. The disk is mounted rigidly to the shatt 2G and receives the rotary motion imparted thereto. Stud will therefore be carried slowly around and will engage theV dog which also will be carried around until it engages the camplate 41. By thus engaqinp;` this cam-plate a continued movement will swing` the arm 39 by reason ot the cam in the direction indicated by the arrow in Fig. l'. Thus it will be seen that when the arm 39 is moved in the direction ot the arrow, the lug- -lo on the arm 39 will slip from under the lug Ll-VT carried by the supporting' arm 45 and allow this arm to drop. The arm 50 being` supported by the arm 45 in a raised position will also 'tall and come into engagement with the ratchet 53, whereby the dog 52 on the arm willv actuate the ratchet and transmit a feeding motion to the patternchain, as in the usual way.

From this description, it will be seen `that at vany predetermined time, train ot gears included in my invention, i may cause the arm 50 to drop into engagement with the ratchet and thereby operate the pattern-chain. The pattern-chain will now be operated and insert the desired pattern into the weave ot the cloth andthe operation ot such pattern-chain will continue until the same has madev one complete revolution-that is, the pattern has been completed.

In order to disengage the dogl 52 from the rack and to restore the arm 45 to its elevated position, I insert in the last pattern 57 ot the pattern-chain 54 a pin 58, This pin 5S actuates the jack 59 which, through thespring 60, exerts a pull on the strap 61, which strap extends over the sheaves 62 and trom thence over a pulley G3 mounted on the Vloom-trame and secured to the arm 45 at 64. It will be understood thatl I may return the arm 45 to its raised position in any suitable manner; I have shown the arrangement just described as embodying' one ot the numerous ways in which it maybe done. 'Ihus it will be seen that as causes the jack 59 to operate, it will exert a ull on the strap 6l and, as just described, raise the arm 45 and with it the arm 50 carrying the arm 50 out ot engagement with the ratchet 53 and stopping the step-by-step motion of the pattern-chain. When the arm 45 is in its lower position, the tace 65 ot the lug 47 abuts the tace 66 of the lug- 48 so that when the arm 45 is again pulled upwardly the lug 48 will snap under the lug 47 by reason ot the pull exerted Yby the through the the last pattern approaches and the pin 58 spring l. When the lug resumes the position shown inlfig. l, that is, under the lug 47, it is obvious that the arm a5 Will be supported in its 'aised position and will remain in such position until theV disk has again completed a revolution vand carried the dog 33 around. to again operate the arm 39 through the cam-plate 4l.

ln order to provide for plain Weaving in a dobby of this construction, I arrange the pins in the bar which carries the pin 58 in such manner that at each outward movement of the lifter which acts upon the lower side of the jacls alternate harness-framesas for instance one or more of the oddnumbered frames`shall be raised, While at cach outward movement of the lifter which acts upon the upper series of the jacks, one or more of the remainingharness-framesfor instance, the even-numbered ones-shall be raised, Therefore it will be seen that uhilc the pattern-chain is inactive or stationary, the loom Willweave plain cloth, which it may do indefinitely or until the timing mechanism has again dropped the arm and allowed the arm to again operate the pattern-chain to insert a pattern in the Weave of the cloth.

lt is obvious that by adjust-ing the throw of the ratchet-operating arm 7 by means of the bolt 9, l may cause it to operate l, 2, 3, or et teeth as desired and thus cause the loom to weave any number of picks before the pattern is inserted again. This may also be done by putting on different ratchets 12, wormgears 2i or bevel-gears 25 and 29. l can therefore cause the pattern to repeat say in 625 picks or 180,000 picks, or Whenever desired by merely adjusting the throw of the ratchet-operating arm, ratchet, Work-gear and bevel-gears. A mill often finds it de` sirable to measure off the cloth in Various lengths, known as cuts, generally 60 yards long. rfhis can be easily accomplished by this multiplier by merely adjusting' the arm ratchet, Worm-gear and bevel-gears.

.lt should be noted that the device can be easily removed from the loom by merely taking off brackets 17 and 37. lt should also be noted that when it is desired to disconnect the multiplier indefinitely, this may also be done in Various Ways, one Way being by removing 7. l n such rase, the loom could then be used without the. mechanism functioning in any manner.

The nature and scope of the invention having been thus indicated and its preferred embodiment having been specifically described, what is claimed as new is:

l. ln a loom of the class described having a pattern-chain and a rocker-arm, a ratchet-Wheel, means operable by said rocker-arm for rotating said ratchet-Wheel. a shaft supported on said loom, a pawl the ratchet-operating arm` loosely mounted on one end of saidshaft, connections between said ratchetwheel and said shaft for rotating the shaft, means for operatively connecting' said paWl to said shaftto rotate therewith, an actuator-arm for actuating said pattern-chain, a lifting arm for supporting said actuator in its inactive position, means for maintaining said lifting arm in its raised position, and a cam on said last-mentioned arm cooperating With said pawl to more said arm and allow said actuator-lifting-arm to drop and said actuatorarm to come into operative position to actuate the pattern chain,

2. n a loom of the class described having` a pattern-chain and a rocker-arm, a ratchet- Wheel and adjustable means for rotating said ratchet-wheel, a shaft and a pa-Wl loosely mounted on one end of said shaft, means between said ratchet-Wheel and said shaft for rotating the shaft, means coupled to said shaft for rotating said pawl therewith, actuating means for said pattern-chain, and

means ope able by said paWl to permit said pattern-chainactuator means to engage in an operative position.

3. ln a loom, a rocker-arm, a patternchain mechanism, an actuator-arm operated by said rocker-arm for actuating` said pattern-chain mechanism, a lifting means including a supporting means independent of the pattern-chain for retaining' the actuatorarm from engagement with said patternchain mechanism, and a timing mechanism including a Worm-gear drive for releasing the supporting means to permit the actuatorarmtc operate the pattern-chain mechanism.

4. In a loom, a rocker-arm, a patternchain mechanism, an actuator-arm operated by said rocker-arm for actuating said patternchain mechanism, a lifting means including a supporting means independent of the pattern-chain for supporting the actuator-arm from chain-operating position, a releasing means for said holding means, and a timing mechanism .including a Worm-gear drive for operating said releasing means.

5. ln a loom, a chain mechanism, an actuator-arm operated by said rocher-arm f actuating said pattern-chain mechanism, a lifting means for displacing the yactimtor-arm from chain-operating position, a supporting means for .said actuator-arm to retain it from chain-operating position, a releasing means for said support-ing means, and a timing mechanism including a Worm-gear drive for operating said releasing means.

6. In Aa lo-om, a rocker-arm, a pattern-chain mechanism provided With a stop-pin, an actuator-arm for said chain-mechanism, a lifting arm for 'the actuator-arm which is engaged therewith at one end and pivoted at its other end to the loom-frame and is adapted to lift the actuator-arm through mechrocher arm, a patternmeans, and a timing mechanism for operating the releasing means.

7. In a loom7 a rocker-arm, a pattern-chain mechanism provided with a stop-pin, an actuator-arm for said vchain mechanism, a lifting arm for the actuator-arm which is engaged therewith at one end and pivoted at its other end to the loom-frame and is adapted to lift the actuator-arm through mechanism operated by the movement of said stop-pin, a supporting means for the lifting arm normally retained in supporting position and comprising a lug on the lifting arm and an arm pivoted at one end to the loomframe and provided with a lng adjacent its free end for engaging beneath the lug on the lifting arm, a releasing means for vthe supporting means, and a timing mechanism for operating the releasing means.

8. In a loom, a rocker-arm, a pattern-chain mechanism provided With a stop-pin, an actuator-arm for` said chain mechanism,V a lifting arm for the actuator-arm which is engaged therewith at one its other end to th-e loom-frame and is adapt ed to lift the actuator-arm through mechanism operated by the movement of saidstoppin, a supporting means for the lifting arm normally retained in supporting position andv provided with a cam-plate, a releasing means for the supporting means comprising a rotating disk having a pin projecting from one face thereof and a loosely-mounted pavvl which is rotated on the disk-supporting-shaft and adapted to engage said cam-plate to release the supporting means from the lifting arm, and a timing mechanism for operating the releasing means.

In testimony whereof I hereunto affix my signature.

F GORDON COBB.

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